Donald Trump lashed out at London Mayor Sadiq Khan on Monday, calling him a “stone-cold loser” after the mayor criticized the British government for inviting the U.S. president for a state visit. On Monday, Trump arrived in Britain with his wife Melania for a three day visit, and he had already blasted Khan before his plane touched down. In a second tweet, Trump compared Khan New York City Mayor Bill de Blasio, who is seeking the Democratic Party’s nomination to oppose Trump in next year’s election. He said – quote – Khan “reminds me very much of our very dumb and incompetent Mayor of NYC, de Blasio, who has also done a terrible job – only half his height,”